Survival analyses require two variable: 1) whether or not it is a "Censored" event, and 2) the length of time to the event of interest.
Censored Event
Choose Select the event date (e.g., death) and using the following function
function main(deathDate) {
if (isNull(V1deathDate)) {
return 0;
}
return 1;
}
Length of Time to Event
Choose the Select the event date (e.g., death), baseline date and the last available encounter date (will need all encounter dates, unless using an "Output Interval" containing the baseline and last follow-up).
function getLength() {
if isNull(baselineDate) {
...